Robert p



(No Model.)

- R. P. GARTY.

KNOB AND SPINDLE LOCK.

No. 509,194. Patented Nov. 21,-

UNITED STATEs PATENT OFFICE.

ROBERT F. OARTY, OF DETROIT, MICHIGAN, ASSIGNOR OF ONE-HALF TO JOHNQGOODRIOH, OF SAME PLACE.

KNOB AND SPINDLE LOCK.

SPECIFICATION formingpartof Letters Patent No. 509,194, dated November 21, 1893.

7 Application filed March 21,1893. Serial No- 467,027- (No model.)

To all whom it may concern.-

Be it known that 1, ROBERT F. CARTY, acitizen of Canada, residing atDetroit, county of Wayne, State of Michigan, have invented a certain newand useful Improvement in Knob and Spindle Locks; and I declare thefollowing to be a full, 'clear, and exact description of the invention,such as will enable others skilled in .the art to which it pertains tomake and use the same, reference being had to the accompanying drawings,which form a part of this specification.

This invention relates to door locks, and has for its object animprovement, in that class of door locks in which the latch is turnedinto and out of engagement with a catch by the spindle and knob.

In carrying out this improvement, I employ a hollow knob, within whichis concealed a lock, and the hollow knob is sleeved upon a bushing thatis secured to the end of the ordinary square spindle by which the latchis drawn. The locking-mechanism is secured to the bushing, and operatesto throw a bolt into such a position that the hollow knob is eitherlocked to the bushing and the spindle or unlocked from it. In the formercase, when the knob is turned the latch is drawn. In the latter case theknob revolves freely on the bushing.

When the lock is used in connection with outside doors I add to the bolta catch which engages with a notch in the rosette whenever the knob isreleased from engagement with the bushing, and thus not only permits theknob to revolve freely, but also holds the latch rigidly to parts thatare made fast to the door itself.

In the drawings, Figure 1, is a front elevation of the knob; Fig. 2, afront elevation of the lock. Fig. 3, is a section of the look as appliedto inner doors; Fig. 4, shows in section those parts of the lock whichare modified in the look as shown in Fig. 3, when the knob is used foroutside doors; Fig. 5, shows the rosette used with outside doors; Fig.6, shows in perspective the several parts of the locking mechanismseparated from each other. Fig. 7 is a section on line a: m of Fig. 5.

D, indicates the square spindle commonly used with what are termedmortise latches or rim latches.

0, indicates a bushing fitting upon the spindle D, cylindrical on itsoutside terminating at its front end within the interior of the knobwith a collar 0, and provided with a slot d, in which is hung a bolt orpawl e.

B,indicates the inner half of the outer shell or coveringoomprising-theknob proper. This is provided with a cylindrical neck I),which is sleeved upon the bushing O. The interior of the neck I), isprovided with a number of notches or serrations adapted to engage withthe end e of the pawl e. The pawl e, is in the form of a bent lever, andnormally the end e is lifted out of engagement with the notches b, by aspring .9. At one side of the collar 0, is a pin a, and upon the pin, a,is hung a tumbler t.

The bushing C, is provided with a central opening 0, to receive the stemis, of a key guide, g; the end of the key guide 9, is flush with theouter surface of the shell A, is concentric with the shell A, and turnsin a perforation, that extends through the shell A; it is held fromescaping from the shell, by the collar 9'.

H, indicates a wheel, provided with four notches n, and also providedwith an eccentric shaped part h. The eccentric h, engages with the end eof the pawl c. The tumbler i, is curved and provided at each of its endswith an inwardly projecting hook or catch, 1, I. It also has an inwardlyextending wing t. The distance between the inner ends of the hooks, Z,Z, is equal to the diameter of the wheel H. The wheel H, on its outerside opposite the side on which the eccentric h, lies is provided with asemicircular lug, j. The

tumbler t, is provided with a lug 19, with which one end of the spring aengages.

In assembling the parts of the lock, the in- I nor half B, of the shellis placed upon the bushing O, in which the pawl e, and the spring 8, hadbeen previously placed, and the bushing is then secured to the spindleby a screw or rivet. The key guide or hub, g, is

passed through the hole in the wheel H, and into the hole G, in the endof the bushing O. The tumbler t, is hung on the pin a, with the end ofthe spring a, underneath the lug t the outer half of the shell is thenput in place and secured to the inner half, by burnishing the edge ofone down over the other. The spring a, tends to throw the hook Z, awayfrom engagement with the wheel H, and tends to draw the hook Z, intoengagement with the wheel H, and into one of the notches, n. A key ofproper shape to operate the lock is passed into the hole through the keyguide and pushed in until the end of it or a notch on it strikes againstthe front face of the wheel 1-1, in aposition to engage with the lug j,and turn the wheel H, as it is itself turned;

the revolution of the wheel H, and the eccentric, h, which forms a partof this wheel actuates the pawl or bolt 2, locking and unlocking thesame; unless the proper key is inserted the tumbler '15, will be swungimproperly and will either not be swung over far enough to cause thehook Z to move out of engagement with the notch n, in which it has beenresting, or it will cause the tumbler t, to swing so far over that thehook Z, will catch in a notch on the opposite side and thus prevent therotation of the wheel H. If desired the tumblers 25, may be multipliedto any desired number.

The lock thus described is for inside doors, such as bed room doors,where the locking part of the knob would be placed to the inside of theroom, leaving it impossible to lock the door from the outside withoutthe key.

.When this look is used with outside doors I add to the part alreadydescribed the features shown in Figs. 4 and 5. To the pawl is added ahook or catch at, that is adapted to engage with a notch 7", cut in thering that surrounds the opening through the rosette. To the knob on theinside of the door I add apush-button P, with the end e, of the pawl e,by a push rod q. Upon pushing the push button R, inward the pawl isturned and the catch n, lifted out of engagement with the notch r, andthe spindle and knob is free to turn. The rosette itself is providedwith points or lugs m, m, that take into the wood work of the door andaid the screws commonly used in securing the rosette to the door,sufficiently to prevent any one from forcibly twisting the rosette outof place.

What I claim is-- 1. In a knob latch, in combination with a spindle anda hollow knob, a bushing secured to the spindle and rotatably engagingin the hollow neck of the knob, a locking pawl, adapted to interlock thebushing and the hollow neck of the knob, means actuated by an insertedkey for moving said locking pawl, substantially as and for the purposespecified.

2. In combination with a knob and the spindle thereof, a bushing securedto said spindle, a hollow neck extending from said knob, a locking pawlsecured in the walls of the bushing, and adapted'to interlock with theknob a notched wheel having a central perforation, and an eccentric hub,'a tumbler adapted to engage said notched wheel, the wheel being adaptedto be rotated by an inserted key, and to itself actuate the locking pawlby means of the eccentrichub, substantially as and for the purposespecified.

3. In a knob latch, the combination of a spindle, a bushing thereon, ahollow knob rotatably secured on said bushing,a locking pawl, adapted tointerlock the knob, and bushing a push rod, extending along the spindleand terminating at the center of the opposite knob, and adapted toactuate said locking pawl, substantially as and for the purposespecified.

4:. In a lock for securing a knob to a spindle the combination of thecentrally perforated notched wheel, provided with the eccentric hub h,the tumbler t, the holding pin a, secured mediately to the spindle, thelocking pawl e, e and the key guide g, substantially as and for thepurpose described.

5. In combination with a spindle, the bushing secured thereto, a hollowknob adapted to turn on said bushing, and provided with looking notchesb, a pawl hung to said bushing and adapted to form an interlocking meansbetween the bushing and the knob, an eccentric wheel hung to saidbushing and engaging with the said pawl to force it into lockingengagement, and a spring adapted to lift the pawl out of interlockingengagement, substantially as and for the purpose specified.

In testimony whereof I sign this specification in the presence of twowitnesses.

ROBERT F. OARTY.

Witnesses: I

CHARLES F. BURTON, EFFIE I. CROFT.

